package hashMap;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class Main {

    public static void main(String[] args) {
        HashMap<String, String> hashMap = new HashMap<>();
        Map<String, String> hashMap2 = new ConcurrentHashMap<>();


        System.out.println("Hello World!");
    }
}
